Non-destructive evaluation of ceramic porosity using terahertz time-domain spectroscopy

被引：12

作者：

Hakobyan, Davit ^{[1
]}

Hamdi, Maher ^{[1
]}

Redon, Olivier ^{[1
]}

Ballestero, Anthony ^{[2
]}

Mayaudon, Alexis ^{[2
]}

Boyer, Laurence ^{[2
]}

Durand, Olivier ^{[2
]}

Abraham, Emmanuel ^{[3
]}

机构：

[1] CEA Tech Nouvelle Aquitaine, Coeur Bersol Batiment B,28 Ave Gustave Eiffel, F-33600 Pessac, France

[2] Parc Ester Technopole, Ctr Technol Transfers Ceram, 7 Rue Soyouz, F-87068 Limoges, France

[3] Univ Bordeaux, CNRS, LOMA, UMR 5798, F-33400 Talence, France

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2022年 / 42卷 / 02期

关键词：

Porosity evaluation; Aluminum oxideAl(2)O(3); Ceramics; Non-destructive evaluation; Dielectric properties; Terahertz time-domain spectroscopy; EFFECTIVE PERMITTIVITY; ELECTRIC-CONDUCTIVITY; LOSS TANGENT; CONSTANTS; MEDIA;

D O I：

10.1016/j.jeurceramsoc.2021.10.026

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Dielectric constants of Al2O3 (alumina) ceramic samples have been measured with non-destructive terahertz time-domain spectroscopy. Using an effective medium approximation, we demonstrated that the relative permittivity can be used to evaluate the porous alumina samples, with porosity fractions ranging from 0% to 20% per volume. This result makes it possible to control sample porosity, a key material parameter related to mechanical strength under compression load, hardness and wear resistance, or thermal stability. We also employed terahertz time-domain spectroscopy to differentiate alumina samples fabricated with different grain sizes, or reveal a small fraction of impurities, such as 5%O of ZrO2, embedded in non-porous alumina. These results demonstrated the potential of terahertz radiation for non-destructive characterization of low loss high dielectric constant ceramics.

引用

页码：525 / 533

页数：9

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